Funny how a phrase can mean two things. “Am I missing something” can, indeed, make one think of revising what was proposed, or if one has actually missed something. I guess I took the wrong fork in the road… 😅

Nope, did not miss anything, other than when I first got my 891, I bought a Tektronix with it. I used it a couple of times but then, as…

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Is there any else to consider? That’s all.

Hey Andy.

I can only speak to the isolation issue. I would think it’s a non-issue in that you are not connected to AC so no common ground. I mean, maximum isolation is always desirable, but in this case, I think, irrelevant. you should be fine.

Now onto the ‘what am I missing?’ question. What are you referring to exactly, the isolation or the gain?

I like to operate POTA and sometimes use an FT-891 mobile rig. The FT-891 has a USB CAT control. I use a cable from the PC to the rig. However, the rig does not have a built-in audio card interface. For modes like FT8, the manual says you can connect the audio signals in the rear of the radio directly to a sound card. I use an audio USB…

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